Izvorni znanstveni članak
The UNIQUAC-NRF Segmental Interaction Model for Vapor-Liquid Equilibrium Calculations for Polymer Solutions
Hamid R. RADFARNIA
; Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
Grozdana BOGDANIĆ
; INA-Industrija nafte d.d., Sektor istraživanja i razvoja, Zagreb
Vahid TAGHIKHNAI
; Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
Cyrus GHOTBI
; Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
Sažetak
This paper presents a new segment-based thermodynamic model containing the combinatorial and energetic contributions to the excess Gibbs energy for correlating/predicting of the vapor-liquid equilibrium (VLE) of polymer solutions. The model is derived from the UNIQUAC-NRF model, recently proposed by Haghtalab and Asadollahi, following the idea to associate the nonideality of polymer-solvent mixture with polymer segment-solvent interaction parameters. Segment activity coefficients are calculated by means of the UNIQUAC-NRF model. At the present state of development, 16 binary segmental interaction parameters have been estimated. The capability of the model is demonstrated with successful representation of VLE correlation/prediction for 40 polymer-solvent systems. The model is capable of correlating predicting the VLE of polymer solutions with satisfactory accuracy and can provide a thermodynamic framework for calculating the VLE of polymer solutions using weakly temperature-dependent UNIQUAC-NRF parameters.
Ključne riječi
polymer solutions; segmental interaction UNIQUAC-NRF model; vapor-liquid equilibrium calculation
Hrčak ID:
388
URI
Datum izdavanja:
20.2.2006.
Posjeta: 2.709 *